Properties of Composite Materials on the Basis of Mixtures of Epoxy Polymers and Oligosulfones. Part 1. Thermomechanical Properties

The influence of modifying additives of oligosulfones of different molecular weight with terminal carboxyl and phenolic groups on the physical and mechanical properties of epoxy polymers is investigated. It is found that the modification allows to increase the tensile strength by 32, the deformation at break by 85, the modulus of elasticity by 47 and the failure rate by 123 %. The maximum set of properties is realized when the epoxy polymer is introduced into the composition of 3–5 wt. с. of oligosulfone with a molecular weight of 4700. It is shown that the magnitude of the effect depends significantly on the amount of the modifier introduced and its molecular weight. The chemical nature of the end groups has little effect on the basic deformation and strength properties. The results of the work allow to recommend the studied oligosulfonsfones for the production of composite polymer materials of structural purpose with improved physical and mechanical properties on the basis of epoxy resins.

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Properties of Compositional Materials Based on the Mixtures of Epoxy Polymers and Oligosulfones. Part 3. Physico-Mechanical Properties

Кочергин¹,

Kochergin

Золотарёва³

et al. 2019

Bulletin of Belgorod State Technological University Named After. V. G. Shukhov

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Properties of Composite Materials Based on Mixtures of Epoxy Polymers and Oligosulfones. Part 4. Adhesion Properties

Kochergin

Grigorenko

Zolotareva

2020

Bulletin of Belgorod State Technological University Named After. V. G. Shukhov

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The influence of oligosulfons with terminal carboxyl and phenolic groups and a molecular weight from 1200 to 44500 on the adhesion properties of epoxy polymers during the shift and separation of adhesive compounds is studied. It is shown that modification leads to the formation of systems characterized by improved adhesion properties, especially at elevated test temperatures. It is established that there is an optimal range of concentrations and molecular weights of oligosulfons (approximately from 2000 to 20000), which provides the maximum effect of modification. It is assumed that the oligosulfon`s particles formed in the epoxy matrix with a small molecular weight have dimensions and volume that are insufficient to be an effective barrier to the propagation of a possible crack in the polymer. At the same time, an oligosulfon with a large molecular weight is able to include a certain part of the epoxy resin in its volume. This leads to a relative decrease in the composition of the share of the epoxy component, which largely determines the adhesion to the material to be bonded. It is shown that the magnitude of the modification effect practically does not depend on the nature of the end groups. The maximum set of properties is realized for oligosulfones with terminal carboxyl groups and a molecular weight in the range from 2500 to 4700, when the concentration of 3 – 10 mass parts on 100 mass parts epoxy oligomer. For oligosulfone with terminal carboxyl groups and a molecular weight of 4700 at a concentration of 10 mass parts manages to increase adhesive strength at a shear of 1.47 and 3.58 times and tensile strength of 1.39 and 5.08 times, respectively, at test temperatures of 293 and 423 K. The research results allow to recommend epoxy-oligosulfone mix to design of structural adhesives, operable in a wide temperature range.

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The Investigation of Effect of Superconstructive Thermoplastics on the Properties of Epoxy Anhydride Binders

Kapasharov

Малков

Garifullin

et al. 2021

KEM

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The present paper is aimed to investigate the effect of modifiers, such as poly (phenylene sulfone) and poly (aril ether ketone), on physico-mechanical and thermophysical properties of heat-resistant epoxy-anhydride binder based on EHD epoxy resin. It was found that the addition of poly (phenylene sulfone) and poly (aril ether ketone) can improve mechanical and impact strength characteristics of the binder with no reduction in heat resistance and thermal stability.

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Properties of Composite Materials on the Basis of Mixtures of Epoxy Polymers and Oligosulfones. Part 1. Thermomechanical Properties

Cited by 4 publications

References 19 publications

Properties of Compositional Materials Based on the Mixtures of Epoxy Polymers and Oligosulfones. Part 3. Physico-Mechanical Properties

Properties of Compositional Materials Based on the Mixtures of Epoxy Polymers and Oligosulfones. Part 3. Physico-Mechanical Properties

Properties of Composite Materials Based on Mixtures of Epoxy Polymers and Oligosulfones. Part 4. Adhesion Properties

The Investigation of Effect of Superconstructive Thermoplastics on the Properties of Epoxy Anhydride Binders

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